Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica
The Antarctic pelagornithid record is restricted to few isolated remains from the Eocene of Seymour Island in the Antarctic Peninsula. Here we report the oldest Antarctic pseudo-toothed bird. It is represented by an incomplete humerus lacking its proximal end, which comes from the lower Eocene level...
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ftconicet:oai:ri.conicet.gov.ar:11336/53468 2023-10-09T21:45:54+02:00 Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica Cenizo, Marcos Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo application/pdf http://hdl.handle.net/11336/53468 eng eng Paleontological Society info:eu-repo/semantics/altIdentifier/doi/10.1017/jpa.2015.48 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-paleontology/article/diversity-of-pseudo-toothed-birds-pelagornithidae-from-the-eocene-of-antarctica/3BE71067C8E077351C758AB255C94DAA http://hdl.handle.net/11336/53468 Cenizo, Marcos; Acosta Hospitaleche, Carolina Ileana Alicia; Reguero, Marcelo Alfredo; Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica; Paleontological Society; Journal of Paleontology; 89; 5; 9-2015; 870-881 0022-3360 CONICET Digital CONICET info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ Pelagornithidae Antarctica Tertiary https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 info:eu-repo/semantics/article info:ar-repo/semantics/artículo info:eu-repo/semantics/publishedVersion ftconicet https://doi.org/10.1017/jpa.2015.48 2023-09-24T19:00:41Z The Antarctic pelagornithid record is restricted to few isolated remains from the Eocene of Seymour Island in the Antarctic Peninsula. Here we report the oldest Antarctic pseudo-toothed bird. It is represented by an incomplete humerus lacking its proximal end, which comes from the lower Eocene levels of the La Meseta Formation (Seymour Island). This new specimen facilitates a review of all known pelagornithids from this continent. Antarctic pelagornithids were classified into two morphotypes that exhibit a mix of putative plesiomorphic and derived characters. Considering the worldwide pelagornithid record and according to estimated wingspans, four approximate size-types were identified. The oldest Antarctic specimens (two fragmentary humeri, middle Ypresian) were assigned to morphotype 1 and correspond to the large size-type. The younger materials (Bartonian/?Priabonian) here assigned to morphotype 2 (some cranial remains, fragmentary tarsometatarsus and humerus) correspond to the giant size-type and represent one of the largest known pseudo-toothed birds. Even though species level phylogenetic affinities of Pelagornithidae remain poorly resolved, three key evolutionary events can be recognized: (1) the disappearance of Dasornis in the Early Eocene and the appearance of more advanced forms with a trend to the specialization of large soaring capacity, (2) the origin of Pelagornis sensu lato species in the early Oligocene, and (3) the appearance and dominance of a highly specialized terminal group at Mio/Pliocene time span. Fil: Cenizo, Marcos. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Reguero, Marcelo Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ... Article in Journal/Newspaper Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) Antarctic The Antarctic Antarctic Peninsula Argentina Seymour ENVELOPE(-56.767,-56.767,-64.283,-64.283) Marcos ENVELOPE(-61.833,-61.833,-64.500,-64.500) Seymour Island ENVELOPE(-56.750,-56.750,-64.283,-64.283) Pampa ENVELOPE(-57.216,-57.216,-63.883,-63.883) Alicia ENVELOPE(-63.483,-63.483,-64.833,-64.833) Acosta ENVELOPE(-62.050,-62.050,-64.700,-64.700) Journal of Paleontology 89 5 870 881 |
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Open Polar |
collection |
CONICET Digital (Consejo Nacional de Investigaciones Científicas y Técnicas) |
op_collection_id |
ftconicet |
language |
English |
topic |
Pelagornithidae Antarctica Tertiary https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
spellingShingle |
Pelagornithidae Antarctica Tertiary https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 Cenizo, Marcos Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica |
topic_facet |
Pelagornithidae Antarctica Tertiary https://purl.org/becyt/ford/1.5 https://purl.org/becyt/ford/1 |
description |
The Antarctic pelagornithid record is restricted to few isolated remains from the Eocene of Seymour Island in the Antarctic Peninsula. Here we report the oldest Antarctic pseudo-toothed bird. It is represented by an incomplete humerus lacking its proximal end, which comes from the lower Eocene levels of the La Meseta Formation (Seymour Island). This new specimen facilitates a review of all known pelagornithids from this continent. Antarctic pelagornithids were classified into two morphotypes that exhibit a mix of putative plesiomorphic and derived characters. Considering the worldwide pelagornithid record and according to estimated wingspans, four approximate size-types were identified. The oldest Antarctic specimens (two fragmentary humeri, middle Ypresian) were assigned to morphotype 1 and correspond to the large size-type. The younger materials (Bartonian/?Priabonian) here assigned to morphotype 2 (some cranial remains, fragmentary tarsometatarsus and humerus) correspond to the giant size-type and represent one of the largest known pseudo-toothed birds. Even though species level phylogenetic affinities of Pelagornithidae remain poorly resolved, three key evolutionary events can be recognized: (1) the disappearance of Dasornis in the Early Eocene and the appearance of more advanced forms with a trend to the specialization of large soaring capacity, (2) the origin of Pelagornis sensu lato species in the early Oligocene, and (3) the appearance and dominance of a highly specialized terminal group at Mio/Pliocene time span. Fil: Cenizo, Marcos. Universidad Nacional de La Pampa. Facultad de Ciencias Exactas y Naturales; Argentina Fil: Acosta Hospitaleche, Carolina Ileana Alicia. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina Fil: Reguero, Marcelo Alfredo. Universidad Nacional de La Plata. Facultad de Ciencias Naturales y Museo. División Paleontología Vertebrados; ... |
format |
Article in Journal/Newspaper |
author |
Cenizo, Marcos Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo |
author_facet |
Cenizo, Marcos Acosta Hospitaleche, Carolina Ileana Alicia Reguero, Marcelo Alfredo |
author_sort |
Cenizo, Marcos |
title |
Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica |
title_short |
Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica |
title_full |
Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica |
title_fullStr |
Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica |
title_full_unstemmed |
Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica |
title_sort |
diversity of pseudo-toothed birds (pelagornithidae) from the eocene of antarctica |
publisher |
Paleontological Society |
url |
http://hdl.handle.net/11336/53468 |
long_lat |
ENVELOPE(-56.767,-56.767,-64.283,-64.283) ENVELOPE(-61.833,-61.833,-64.500,-64.500) ENVELOPE(-56.750,-56.750,-64.283,-64.283) ENVELOPE(-57.216,-57.216,-63.883,-63.883) ENVELOPE(-63.483,-63.483,-64.833,-64.833) ENVELOPE(-62.050,-62.050,-64.700,-64.700) |
geographic |
Antarctic The Antarctic Antarctic Peninsula Argentina Seymour Marcos Seymour Island Pampa Alicia Acosta |
geographic_facet |
Antarctic The Antarctic Antarctic Peninsula Argentina Seymour Marcos Seymour Island Pampa Alicia Acosta |
genre |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
genre_facet |
Antarc* Antarctic Antarctic Peninsula Antarctica Seymour Island |
op_relation |
info:eu-repo/semantics/altIdentifier/doi/10.1017/jpa.2015.48 info:eu-repo/semantics/altIdentifier/url/https://www.cambridge.org/core/journals/journal-of-paleontology/article/diversity-of-pseudo-toothed-birds-pelagornithidae-from-the-eocene-of-antarctica/3BE71067C8E077351C758AB255C94DAA http://hdl.handle.net/11336/53468 Cenizo, Marcos; Acosta Hospitaleche, Carolina Ileana Alicia; Reguero, Marcelo Alfredo; Diversity of pseudo-toothed birds (Pelagornithidae) from the Eocene of Antarctica; Paleontological Society; Journal of Paleontology; 89; 5; 9-2015; 870-881 0022-3360 CONICET Digital CONICET |
op_rights |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
op_doi |
https://doi.org/10.1017/jpa.2015.48 |
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Journal of Paleontology |
container_volume |
89 |
container_issue |
5 |
container_start_page |
870 |
op_container_end_page |
881 |
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1779321557025292288 |